Recent content by John Mulcahy

  1. John Mulcahy

    REW Beta Release REW API beta releases

    I have fixed that for the next build.
  2. John Mulcahy

    Why do measurement results appear differently on different computers?

    You don't have to retake the measurements, just open them in the newer version.
  3. John Mulcahy

    Why do measurement results appear differently on different computers?

    Deep notches in the measurement due to reflections cause complete phase rotations over narrow frequency ranges. The more recent version does a better job of removing those effects when the measurement is smoothed.
  4. John Mulcahy

    Why do measurement results appear differently on different computers?

    The measurement is the same, just better handling of smoothing.
  5. John Mulcahy

    Why do measurement results appear differently on different computers?

    The more recent build has an improved phase smoothing algorithm.
  6. John Mulcahy

    “In macOS, when starting SPL measurement, the speaker cannot produce any signal sound.

    In the Mac's Audio Midi Setup utility make sure the input and output for the Duet 3 are set to the same sample rate and match the rate in REW.
  7. John Mulcahy

    Why do measurement results appear differently on different computers?

    Which REW version(s)?
  8. John Mulcahy

    “In macOS, when starting SPL measurement, the speaker cannot produce any signal sound.

    The SPL meter shows sound levels captured by the selected audio input. It doesn't generate anything. You can use the signal generator to produce output signals.
  9. John Mulcahy

    Waterfall Graph and quasi-anechoic measurements

    Select CSD mode, rise time 1 ms, window 5 ms, time range 5 ms. You can try different window and time range settings.
  10. John Mulcahy

    Problem with RTA measurement

    My Win11 system doesn't do that, also running 24H2.
  11. John Mulcahy

    Problem with RTA measurement

    There were some Win11 USB audio issues reported a little while ago, but I don't know which builds were affected.
  12. John Mulcahy

    How to average the dB SPL of a measurement over a specific freq range

    You can use the graph metrics on the SPL & Phase graph to get average level over a selected span.
  13. John Mulcahy

    Problem with RTA measurement

    That's certainly pretty strange behaviour, I haven't seen anything like that before. You could try the mic in another application to see how that behaves.
  14. John Mulcahy

    Problem with RTA measurement

    The video is blurred so I can't see what the input is, what driver you are using or what REW version. If you are on Windows use the Java drivers and choose the input for the UMIK that starts "EXCL".
  15. John Mulcahy

    Arithmetic shows additional gain +3dB

    Use the SPL axis.
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JTR Speakers SVSound Essence Audio

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